9 letters · 20 points in Scrabble
originEtymology tree English excite Proto-Indo-European *kerh₃-der.? Latin carbōlbor. French carbonebor. English carbonbf. English -on English exciton Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ik English -ic English excitonic From exciton + -ic.
Etymology from Wiktionary, CC BY-SA 3.0